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H. P. BALL.

CONNECTING PLUG. APPLICATION men 1AN.6, 1915.

v l 1 9%, 1 22 Patented Aug. 8, 1916 Witnesses inventor:

26 Henrg Fric Bali,

shown in Fig.

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I'IENRY PRICE BALL, OF NEW YORK, N. Y., ASSLIGNOR TO GENERAI ELECTRIdCOMPANY,

A CORPORATION OF NEW YORK.

CONNECTING-PLUG.

To all whom it may concern Be it known that I, HENRY Pnror. BALL, acitizen of the United States, residing in the borough of Manhattan,State of" New York, have invented certain new and useful Improvements inConnecting-Plugs, of which the following is a specification.

My invention has reference to connecting plugs for electric conductorsand the method of making the same, and has for its object the provisionof a rugged, simple and 'efiicient device of this character,

My invention relates more particularly to connecting plugs forconnecting anddisconnecting electric heating devices, and the like withsupply circuits. Flags of the type to which my invention relates areusually handled by inexperienced operators, and they must, therefore, beable to withstand the careless handlingwhi'ch in practice they usuallyreceive.

y invention provides a plug which is simple and efiicient, and which is,at the same time, adapted to withstand severe usage.

For a fuller understanding of my invention, reference may be had to theaccompanying'drawing, which shows one embodiment thereof, and in whichFigure 1 is a perspective view of a socket made in accordance with myinvention; Fig. 2 is a plan View, partially broken away, of a connectingplug comprising the socket 1, and terminal. pins adapted to engage theof a metal. blank of suitable form to be shaped into a socket; Fig. 4..is similar to Fig. 3, but showing the spring finger bent back uponitself; Fig. 5 shows a socket formed from the blank; and Fig. G'shows'the device completed with the s'hankbent back upon itself.

Referring, now, to the drawings, and first to Figs. 3 and 4, 1 is ablank, preferably of sheet metal and of such form that when properlyshaped it forms the socket comprised in my invention. The blank isformed with an elongated finger 2 and with a shank 3, which ispreferably of sufficient length so that it can be bent back upon itselfat 4 (see Fig. 6) to' strengthen the portion to which the binding postsand the ends of r the conductors are connected. The shank is providedwith two openings 5-5 which register with each other when the shank isSpecification of Letters Patent.

socket; Fig-3 18 a plan view Patented Aug. a, rare.

Application filed January 6, 1915. Serial No. 748.

bent upon itself. A shank so formed is old in the art, and I In shapingthe blank intoa socket, I first 6 to form a contact ling-e117. I thenshape the blank into a socket which is provided with two faces 8 and 9opposite the contact spring and .which are angularly disposed withreference to each other, so that when the terminal pin is receivedwithin the socket, the contact finger will press the same against thetwo sides 8 and 9 so as to form a good contact between the socket andpin. Preferably the socket is pentagonal in form, the two remainingsides 10 and 11 adjacent that side of the socket carrying the contactspring being parallel and their distance apart preferably beingapproximately the same as the "diameter. of the terminal pin which is t6be received within the socket. It will be apparent that when the socketis made open at two adjacent edges, in the manner indicated, the socketas a whole will be more or less. yielding so as to accommodate the pinterminal and maintain contact between the pin and the two sides 10 and11..

claim no novelty therefor.

The sockets are received in recesses 12 in the insulating members 1 3 inthe'usual manner.

It will be apparent that the socket comprised within my invention, whichis formed of a single piece of metal, is easily and cheaply made, andthat it engages the terminal pin 16 at a plurality of contact points,and thus formsa good electrical connection therewith. p e

In accordance with the provisions of the patent statutes, I havedescribed the principle of operation of my invention, together with theapparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparatus shown is only.illustrative and that the invention can be carried out by other means.

'What I claim as new and desire to secure by Letters Patent of theUnited States, is i 1. The method of making a socket for a connectingplug, which consists in forming a blank with an elongated spring finger,I

2. The method of making a metal socket for aconnecting plug, whicforming a metal blank with an spring finger, bending the finger itselfto form a spring fin lank transverse finger and thereby forming a gfinger within the tudinally thereof. g a. socket for a which consists inpreparlongated spring finger, back upon itself to form and then formingthe 'with the portions of the forming an angle. cting plug formed t backupon itself ng faces opposite h consists in bending the b 1y of the bendin the spring socket having a sprin same and extending longi ,3. Themethod of makin connecting plug, ing a blank with an e bending thefinger a contact spring, blank into a socket socket oppositethe spring4:. A socket for a conne with a contact finger ben within the socket andhavi ring forming an angle whereby g contact is adapted to press thetermihich is received within the socket against at least two interiorfaces of "the socket opposite the contact spring.

5. A socket for a connecting plug'formed of a single piece of metal andprovided with a spring contact finger bent back upon itself within thesocket. v

6. A socket'for a connecting plug formed of a single piece of metalprovided with a contact finger bent back upon itself within the socketand extending longitudinally thereof, the socket being provided oppositethe spring with faces angularly placed with reference to each other.

7. A pentagonal socket for a connecting plug formed with a contactfinger on one of the sidesbent back upon itself.

In witness whereof, I have hereunto set my hand this 31st day ofDecember, 1914.

HENRY PRICE BALL.

Witnesses:

E. M. WHELAN, I. S. MENZIES.

